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    Fluid-Particle Interactions and Resuspension in Simple Shear Flow

    Source: Journal of Hydraulic Engineering:;2003:;Volume ( 129 ):;issue: 012
    Author:
    Zhi-Gang Feng
    ,
    Efstathios E. Michaelides
    DOI: 10.1061/(ASCE)0733-9429(2003)129:12(985)
    Publisher: American Society of Civil Engineers
    Abstract: The lattice Boltzmann method (LBM) is used to simulate the particle resuspension process in a two-dimensional simple shear flow. At first, the lift force on a single disk-shaped particle attached at the channel wall is computed. It is found that when the particle is allowed to freely move in the viscous fluid, the resulting lift force is smaller than that when the particle is constrained to be stationary. The bulk properties of fluids with particles suspended under various concentrations are numerically calculated. The results agree reasonably well with analytical results by Batchelor when the volume fraction is lower than 50%. The resuspension process of a group of particles (up to 500) is simulated at different particle-to-fluid density ratios. It is found that the height and shape of particle bed depend on the particle density ratio and flow conditions. Interactions of groups of particles as well as the final shape of the bedform of the particles were studied during this resuspension process. Finally, the pressure distribution and flow above the bedform of particles was examined. The results obtained agree well with those observed in naturally occurring bedforms of sediments.
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      Fluid-Particle Interactions and Resuspension in Simple Shear Flow

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/25499
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    contributor authorZhi-Gang Feng
    contributor authorEfstathios E. Michaelides
    date accessioned2017-05-08T20:44:28Z
    date available2017-05-08T20:44:28Z
    date copyrightDecember 2003
    date issued2003
    identifier other%28asce%290733-9429%282003%29129%3A12%28985%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/25499
    description abstractThe lattice Boltzmann method (LBM) is used to simulate the particle resuspension process in a two-dimensional simple shear flow. At first, the lift force on a single disk-shaped particle attached at the channel wall is computed. It is found that when the particle is allowed to freely move in the viscous fluid, the resulting lift force is smaller than that when the particle is constrained to be stationary. The bulk properties of fluids with particles suspended under various concentrations are numerically calculated. The results agree reasonably well with analytical results by Batchelor when the volume fraction is lower than 50%. The resuspension process of a group of particles (up to 500) is simulated at different particle-to-fluid density ratios. It is found that the height and shape of particle bed depend on the particle density ratio and flow conditions. Interactions of groups of particles as well as the final shape of the bedform of the particles were studied during this resuspension process. Finally, the pressure distribution and flow above the bedform of particles was examined. The results obtained agree well with those observed in naturally occurring bedforms of sediments.
    publisherAmerican Society of Civil Engineers
    titleFluid-Particle Interactions and Resuspension in Simple Shear Flow
    typeJournal Paper
    journal volume129
    journal issue12
    journal titleJournal of Hydraulic Engineering
    identifier doi10.1061/(ASCE)0733-9429(2003)129:12(985)
    treeJournal of Hydraulic Engineering:;2003:;Volume ( 129 ):;issue: 012
    contenttypeFulltext
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